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Cold-induced mortality is a key factor driving mountain pine beetle( Dendroctonus ponderosae) population dynamics. In this species, the supercooling point (SCP) is representative of mortality induced by acute cold exposure. Mountain pine beetle SCP and associated cold-induced mortality fluctuate throughout a generation, with the highest SCPs prior to and following winter. Using observed SCPs of field-collected D. ponderosae larvae throughout the developmental season and associated phloem temperatures, we developed a mechanistic model that describes the SCP distribution of a population as a function of daily changes in the temperature-dependent processes leading to gain and loss of cold tolerance. It is based on...
Categories: Data;
Types: Downloadable,
Map Service,
Raster;
Tags: Cold hardiness,
Cold resistance,
Cold tolerance,
Data Visualization & Tools,
Idaho,
Humans have dramatically altered wildlands in the western United States over the past 100 years by using these lands and the resources they provide. Anthropogenic changes to the landscape, such as urban expansion, construction of roads, power lines, and other networks and land uses necessary to maintain human populations influence the number and kinds of plants and wildlife that remain. We developed the map of the human footprint for the western United States from an analysis of 14 landscape structure and anthropogenic features: human habitation, interstate highways, federal and state highways, secondary roads, railroads, irrigation canals, power lines, linear feature densities, agricultural land, campgrounds, highway...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Arizona,
California,
Idaho,
Montana,
Nevada,
These are web links to a folder in Data Basin, containing simulations of future vegetation types. From the description in Data Basin: "The dynamic global vegetation model MC1 was run for the North American continent using historical and future climate projections to simulate vegetation shifts, carbon gains and losses, hydrological flows, and wildfires. This work has not been published yet and should be considered as not peer reviewed. Note that we have added a file as an attachment to this gallery to provide the list of vegetation types that are simulated by the vegetation model and the category number that is associated with each type. When using the identify tool this will be useful to match number and name...
Categories: Data,
Web Site;
Types: Downloadable,
Raster;
Tags: Data Basin,
North America,
biomass,
carbon,
model,
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